Seth Green
Milo (voice)
Joan Cusack
Mom (voice)
Dan Fogler
Gribble (voice)
Breckin Meyer
Alien (voice)
Elisabeth Harnois
Ki (voice)
Tom Everett Scott
Milo's Dad (voice)
Mindy Sterling
Supervisor (voice)
Julene Renee
Martian (voice)
Raymond Ochoa
Martian Hatchling (voice)
Robert Ochoa
Ryan Ochoa
Seth Robert Dusky
Milo (voice) (as Seth Dusky)
Amber Gainey Meade
Martian
Dee Bradley Baker
Two Cats (uncredited)
Adam Jennings
Aaron Rapke
Jacquie Barnbrook
Kevin Cahoon
Wingnut
Kirsten Severson
Matthew Henerson
Stephen Kearin
Jason Corgan Brown
Art Department Manager
Doug Chiang
Production Design
Robert Presley
Director of Photography
Benjamin Feder
Costume Design
Garrett Warren
Stunt Coordinator
Simon Wells
Director
Wayne Wahrman
Editor
Michael Leung
Lighting Artist
James Sathre
Lighting Technician
Scot Boland
Casting
Victoria Burrows
Jack Rapke
Producer
Robert Zemeckis
Steve Starkey
Steven J. Boyd
John Powell
Original Music Composer
Randy Thom
Sound Designer
Jimmy Almeida
Animation
Michael Parks
Yuhon Ng
Berkeley Breathed
Book
Screenplay
Wendy Wells
Writer
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